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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 47,815
Suppose you have a ferromagnet with relative magnetic permeability μ.And it is sittuated in a magnetic field B. What...
Oct18-11 12:33 PM
alex.rechilie
0 758
How is that when: A wagon collides with the velocity (v) with another wagon (at rest, v=0) of the same mass (m) on...
Oct18-11 12:10 PM
RobinSky
8 1,456
Hi all, if I have the velocities and rotations of an object with respect to a moving frame. Are there relations that...
Oct18-11 10:55 AM
chrisbaird
3 1,997
hey guys can anyone pls say how much current in amps does a ordinary car battery of 12v generates?? pls......
Oct18-11 09:50 AM
JeffKoch
14 1,609
Consider a brick-shaped ferromagnetic of relative magnetic permeability µ >> 1, which has dimensions 2a × 2a × a and a...
Oct18-11 08:23 AM
alex.rechilie
0 807
Hi everyone, I have a problem that I hope someone can help me with, the question is. A mass of 500kg induces a...
Oct18-11 08:13 AM
Rastanking
0 589
Hi, I'm having some trouble about the calculation of saros cycle in example 13.9 of Greiner's book "classical...
Oct18-11 04:26 AM
babylonia
0 559
Hi, I don't understand what the off-diagonal terms in the moment of inertia (tensor) matrix are intuitively....they...
Oct17-11 06:03 PM
TGlad
11 3,347
Hi everyone, Well everything is in the title. Answers are not clear on the net and I cannot figure it out myself.
Oct17-11 05:56 PM
atyy
7 1,867
For a process at constant pressure, ΔH=q. My textbook clearly says that the only way that enthalpy can change is...
Oct17-11 05:50 PM
Andrew Mason
9 12,274
So, in a physics lab I TA, we are doing a lab in which part of it, the students try to do Faraday's Ice Pail...
Oct17-11 02:49 PM
elegysix
10 1,917
Hi, first sorry for my bad English, I am more skilled to read than to write in English I don't know if this is the...
Oct17-11 02:40 PM
elegysix
3 1,252
This is related to Goldstein Exercise 3-28. It is not really a homework problem anymore because I have solved them....
Oct17-11 02:35 PM
yenchin
1 1,595
For electrostatics, I know that conductors have 0 electric field inside. And I know that the surface of a spherical...
Oct17-11 01:15 PM
chrisbaird
1 1,223
I was looking at some sliding doors and thinking/reviewing about the concept of work. So I have a few questions ...
Oct17-11 12:18 PM
chrisbaird
5 1,241
I am a bit confused about a statement I read in my textbook saying the sum of external forces on a body is equal to...
Oct17-11 12:15 PM
freemovement
11 2,175
Hey, all! Browsing around the library for some mechanics books, I happened to come across Manuel Prieto Alberca's...
Oct17-11 12:07 PM
Metaleer
11 1,527
Hello everybody, I have a question about the Fresnel equations at normal incidence. My textbook gives the reflection...
Oct17-11 11:19 AM
brianpile
5 3,388
Hello I have found in some text books that the magnetic scalar potential is continuous across a boundary. Now, how...
Oct17-11 07:37 AM
baggiano
2 1,577
I am trying to understand why work is a scalar, without knowing ahead of time that work is defined as: W_{ab} =...
Oct17-11 06:43 AM
Delta˛
29 4,766
Hi all. I want to create a Cooler for my CPU to better over-clocking Because heat has a negative affect on cpu...
Oct17-11 03:23 AM
Lsos
8 1,958
A little curiosity here. In my Electricity and Magnetism class, for the first half of the semester we were taught...
Oct17-11 02:21 AM
Philip Wood
5 1,237
Need to calculate motor size to drive skip dolley system. have the following: Frame on 6 wheels. Gearbox/motor...
Oct17-11 01:01 AM
Inenzo
2 1,050
Hi, I have a fairly simple question, but I am a newbie. I have to move a tricycle from one position to another....
Oct16-11 11:18 PM
elegysix
1 789
Hello, I am currently trying to come up with an idea for a project for my advanced physics lab. I have thought to do...
Oct16-11 11:09 PM
elegysix
2 1,370
Suppose I have acceleration defined as a function of position, "a(x)". How to convert it into a function of time...
Oct16-11 10:16 PM
Ken G
2 1,623
The power stored in an inductor is E=0.5LI2 which is independent of frequency However, the impedance is ωL. So, what...
Oct16-11 09:01 PM
Born2bwire
5 3,472
When swimming underwater, why does sound from above the surface sound very faint? I know that the answer to this...
Oct16-11 04:27 PM
Bobbywhy
2 1,030
Useful equation. Avg. Power p(t)=(V^2(t))/R My attempt at instantaneous power was p(t,V,R)= ∫(0->1 for t...
Oct16-11 04:27 PM
Petyab
2 767
I do not understand this one step in deriving the angular momentum theorem for a system of particles. The vector...
Oct16-11 02:05 PM
Xyius
2 620
Basically, I am parallel capacitor. First thing i am confused about how are electrons transfer so that the plates...
Oct16-11 01:31 PM
fahad12
0 530
Here is an experiment I found on youtube: http://www.youtube.com/watch?v=grJYxdJVTZ4 Here is how I understand...
Oct16-11 09:44 AM
A.T.
17 4,797
Why is the change in potential energy the NEGATIVE of the work done by a force? What is the negative sign doing...
Oct16-11 04:32 AM
aker221
8 7,032
As a quick heads up, I'm buried over my head in an imager project, and the portion that has given me the most headache...
Oct16-11 01:58 AM
Mike_In_Plano
2 867
suppose rain water is being collected in bucket. does the rate at which it fill depend on wind?
Oct16-11 01:03 AM
Mike_In_Plano
3 1,475
A professor the other day used an induction coil power a crt tube like the one at the link below. ...
Oct15-11 11:51 PM
Mike_In_Plano
1 1,403
I want to verify the mechanism to which a varying E can induce voltage into a shielded coax. According to Maxwell ...
Oct15-11 11:45 PM
Mike_In_Plano
3 1,415
Hello. So: Why does magnetic force tend to increase magnetic energy? 1) Usually, forces go in the direction of energy...
Oct15-11 11:32 PM
Mike_In_Plano
2 1,035
Hello, So I have a question about electric power lines. Today I was under some large power lines and I noticed...
Oct15-11 11:22 PM
Mike_In_Plano
3 1,447
I am new to lasers. In the expression for q parameter, 1/q = 1/R - j(λ/πw^2) how did we come to know that w(z) is a...
Oct15-11 10:20 PM
wukunlin
3 1,532

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